diff --git a/.gitignore b/.gitignore
index cc003a3..fd254db 100644
--- a/.gitignore
+++ b/.gitignore
@@ -172,6 +172,7 @@ gradle-app.setting
 # # Work around https://youtrack.jetbrains.com/issue/IDEA-116898
 # gradle/wrapper/gradle-wrapper.properties
 
+*.hprof
 
 # Forge
 run/
diff --git a/src/main/java/com/sosnitzka/taiga/util/Generator.java b/src/main/java/com/sosnitzka/taiga/util/Generator.java
index 9890bff..18bf42f 100644
--- a/src/main/java/com/sosnitzka/taiga/util/Generator.java
+++ b/src/main/java/com/sosnitzka/taiga/util/Generator.java
@@ -198,6 +198,10 @@ public class Generator {
                     // we are in mid air, go down
                     while (world.getBlockState(cPos.down()).equals(Blocks.AIR.getDefaultState())) {
                         cPos = cPos.down();
+
+                        // if we are below 0, we might be in a void dim
+                        if (cPos.getY() < 0)
+                            break;
                     }
                 }
                 if (!validSurface.contains(Item.getItemFromBlock(world.getBlockState(cPos.down()).getBlock())))